Cell-surface membrane

Question 1

The structure of the cell surface membrane – although the structure looks static the

Answer 1

phospholipids and proteins forming the bilayer are constantly in motion

Question 2

All cells are surrounded by a cell surface membrane which controls the

Answer 2

exchange of materials between the internal cell environment and the external environment
The membrane is described as being ‘partially permeable’

Question 3

The cell membrane is formed from a

Answer 3

phospholipid bilayer of phospholipids spanning a diameter of around 10 nm

Question 4

phospholipid bilayer of phospholipids what is it

Answer 4

The structure of a phospholipid bilayer is composed of two layers of phospholipid molecules with their hydrophobic tails facing each other and their hydrophilic heads facing outward.

The hydrophobic tails form a hydrophobic interior, while the hydrophilic heads interact with the surrounding water-based environment.